Type-writer cabinet



(No Model.)

V. LAP'HAM. TYPE WRI-TBR CABINET.

No. 459,406. Patented Sept. 15, 1891.

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` UNITED STATES Armar trice.

AVALENTINE LAPHAM, OF CHICAGO, ILLINOIS, ASSIGNOR TO ELVVOOD T. BAKER, OF BRIDGEPORT, CONNECTICUT.

TYPE-WRITER CABIN ET.

SPECIFICATION forming part of Letters Patent No.1459,406, dated September 1,5, 1891.

Application tiled May 9 1891. Serial No. 392.211. (No model.)

To all whom it may concern:

Be it known that I, VALENTINE LAPHAM, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Type-Vriter Cabinets, of which the following is a specification.

My invention relates, particularly, to animprovement in typewriter cabinets invented by Frederick Sanderson, of Chicago, Illinois, and for which application for patent was filed October 13, 1890, Serial No. 367,952, and allowed-February 26, 1891.

In the invention above referred to there is a sliding board F, which has a forward or backward movement over the rear part of the top of the cabinet respectively when the cabinet is closed or opened, and the manner of action of said board in relation to the top of the cabinet being objectionable my object is to introduce a means operating in combination with the other parts which will obviate the objectionable feature and give the operative parts a smoothness of action never before attained.

My improvement is shown in combination with the mechanism illustrated in the accompanying drawings, in which- Figure l is a front view of the cabinet in the open position. Fig. 2 is a section of Fig. l on line d h, with the several links and their hinge attachments in elevation for one side only. Fig. 3 is the same section as Fig. 2, except that the cabinet is shown in the closed position, Fig. 2 being open.

Similar letters refer to like parts through out the several views in the accompanying drawings and also in the drawings accompanyin g the application for patent of Frederick Sanderson, hereinbefore referred to, as far as is necessary to fully describe my improvement.

Referring to the accompanying` drawings, A is the body of the cabinet, and A the top. In this instance, as shown in Fig. l, about two-thirds of thelength of the cabinet is used for the type-writer and forms a space B from top A to the floor. At c is the usual stationary shelf, which forms the rear bottom of the type-writer receptacle. lVhen the cabinet is closed, d and c are respectively the rear and front suspension-links.

C is the left andD the right side of space B.

E is the board upon which is placed the type-writer. F is a board which forms the movable top.

G is the knob, of any form of catch or lock for holding the parts in an open or closed position. Link d is pivoted to the side D of space B at Z and its lower end is pivoted to 6o the rear of board Eat m. Link e is pivoted to the side D of space B atn and its top end is pivoted to board F, as shown,while its lower end is pivoted to the type-writer board E.

In Sandersons invention, hereinbefore referred to, the operative parts consisted of top board F, links d and e, and type-writer board E, with links d and e pivoted to the cabinet and to boards F and E, as herein shown and described. The rear of board F rested upon 7e the topof a small roller which was pivoted at the top of the cabinet at j, and the top of the roller projecting above the top A oi' the cabinet held board F above the surface thereof and prevented its abrading the surface when 7 5 board F was reciprocated forward or backward in the act of closing oropening the cabinet. This construction was found to be objectionable for the reason that papers lying upon the top of the rear part of the vtop of 8o the table were slid backward whenever the cabinet was opened, and also the parts did not operate smoothly and without a disagreed able noise. These objectionable features were entirely removed by the introduction of the third link J, whose lower end is pivoted to the side D of space B at r and its upper end to the under side of board F at s, being at the rear of link c, and having its pivotal centers the same distance apart as the top 9o and center pivotal centers of link e. Itis very obvious that in opening and closing the cabinet the link J and upper end of link e will partake of a vibratory partial rotary motion, the top ends of links J and e moving in the segment of circles of an equal size, and therefore holding the board F irmly'and alwaysv parallel with the top A of the cabinet, the board F ,firstbeing lifted from the position shown in Fig. 3, carried backward and roo F, hinged to the upper ends of links e and J, the distance between the pivotal centers of the link e from n to the center of the hingek at its upper end being substantially the saine as the distance between centers s and o of link J, the parts operating for the purpose and substantially in the manner described.

VALENTINE LAPHAM.

Witnesses:

D. FRANCES SEELEY, NVILMA M. Ron. f 

